json - 在将数据从角度发送到弹簧启动后，无法将数据转换为角度 13 中的 json 内容类型'text/plain;charset=UTF-8' not supported]

Question

我正在尝试通过以下方式提交表单：

saveBuildcompany(): void {
    // @ts-ignore

  
    // @ts-ignore
    console.log(this.group?.value);
    
   let data2=this.group.value;
    let serializedForm = JSON.stringify(data2);

   console.log(data2);
   // data2.sociallinks.stringify;
    this.buildcompanyService.create(serializedForm)
      .subscribe({
        next: (res) => {
          console.log(res);
          this.submitted = true;
        },
        error: (e) => console.error(e)
      });
  }

服务如下：

create(data: any): Observable<any> {
    let headers = new HttpHeaders();
    headers.append('Content-Type', 'application/json');
    headers.append('Accept', 'application/json');
    return this.http.post(baseUrl+"/add", data, {headers: headers});
  }

毕竟我得到了标题中的异常。我做错了什么？

Answer 1

如果您要发送表单数据，请将“Content-Type”更改为application/x-www-form-urlencoded“Accept” 。application/json

create(data: any): Observable<any> {
    let headers = new HttpHeaders({'Content-Type': 'application/x-www-form-urlencoded', 'Accept': 'application/json'});
    return this.http.post(baseUrl+"/add", data, {headers: headers});
  }

或者

create(data: any): Observable<any> {
    let headers = new HttpHeaders();
    headers.set('content-type', 'application/x-www-form-urlencoded')'
...
    return this.http.post(baseUrl+"/add", data, {headers: headers});
  }

Answer 2

您可以将“Content-Type”更改为application/x-www-form-urlencoded和“Accept” application/json。并尝试以下是代码片段。

create(data: any): Observable<any> {
    let headers = new HttpHeaders({'Content-Type': 'application/x-www-form-urlencoded', 'Accept': 'application/json'});
    return this.http.post(baseUrl+"/add", data, {headers: headers});
  }

Answer 3

只是总结一下我上面的所有悲伤。实际的创建函数是这样的。这是发送正确的标头信息：

create(data: any): Observable<any> {
    let headers = new HttpHeaders({'Content-Type': 'application/json', 'Accept': 'application/json'});
    return this.http.post(baseUrl+"/add", data, {headers: headers});
  }